Imagine you went back in time a couple thousand years: Could you use what you know from a contemporary physics high school program to rule the world ?
Well played, yes you could! And what would you focus on: First create a power source. EM induction would do the trick!
More seriously, EM induction is used in a large fraction of electrical devices you use everyday. You can find it in you car, in a dynamo, in any motor, in your headphones and microphones etc...
This playlist compiles videos that explains EM induction in simple terms! Finally!
Episode 1 (
youtu.be/N44pn9rYtbE) : we give a basic example of application of EM induction (The dynamo in a lamp), as well as the three basic principles to be understood in order to study EM induction in good conditions
_ The effect of a magnetic field on a moving charge (F= qvB),
_ The effect of an electric field on a charge located between two charged plates (F=qE),
_ The effect of a magnetic field on a wire carrying an electric current (F=ILB).
Episode 2 (...): explains what happens within in the metallic bar when you move it in a magnetic field, and how this results in an emf across the bar. Then an example is shown where a bar is sliding on metallic rails, which are themselves connected to a load (Resistance or lamp bulb). This consist in a circuit where the battery is the moving bar!
It is shown also that the mechanical energy provided to move the bar is equal to the electrical energy dissipated in the load (Conservation of energy)
Episode 3 (To come soon): What is Magnetic Flux
Episode 4 (To come soon): Faraday's Law
Episode 5 (To come soon): Lenz's law
Episode 6 (To come soon): Generating AC currents with EM induction
Project
Episode 7 : RMS values,
Episode 8: Power in an AC circuit,
Episode 9: Transformers
If you enjoy these videos and find them useful for your studies, please like the video and playlist, and subscribe to the channel!
Edouard Andre Reny, PhD in material science, is a private tutor in Physics. Website:
www.physics-tutor.nl
Background musics composed and produced by Edouard Andre Reny. Website:
www.synaptic-machines.com